/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:24,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:24,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:24,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:00:24,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:24,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:24,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:24,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:24,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:24,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:24,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:24,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:24,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:24,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:24,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:24,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:24,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:24,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:24,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:24,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:24,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:00:24,267 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:24,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:24,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:24,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:24,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:24,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:24,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:24,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:24,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:24,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:24,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:24,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:24,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:24,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:24,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:24,271 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:24,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:24,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:24,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:24,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:24,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:24,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:24,273 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:00:24,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:24,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:24,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:24,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:24,618 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:24,618 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2020-08-22 23:00:24,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fca042e5/a68e319d26e14f79a4c8b32fce7b0ad5/FLAG9dd239aaa [2020-08-22 23:00:25,167 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:25,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2of.c [2020-08-22 23:00:25,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fca042e5/a68e319d26e14f79a4c8b32fce7b0ad5/FLAG9dd239aaa [2020-08-22 23:00:25,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fca042e5/a68e319d26e14f79a4c8b32fce7b0ad5 [2020-08-22 23:00:25,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:25,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:25,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:25,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:25,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:25,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:25,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dc9bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25, skipping insertion in model container [2020-08-22 23:00:25,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:25,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:25,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:25,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:25,876 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:25,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:25,998 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:25,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25 WrapperNode [2020-08-22 23:00:25,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:25,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:25,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:25,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:26,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:26,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:26,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:26,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:26,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:26,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:26,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:26,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:26,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:26,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:00:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:26,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:26,507 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:26,508 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 23:00:26,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:26 BoogieIcfgContainer [2020-08-22 23:00:26,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:26,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:26,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:26,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:26,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:25" (1/3) ... [2020-08-22 23:00:26,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ff109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:26, skipping insertion in model container [2020-08-22 23:00:26,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25" (2/3) ... [2020-08-22 23:00:26,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9ff109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:26, skipping insertion in model container [2020-08-22 23:00:26,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:26" (3/3) ... [2020-08-22 23:00:26,522 INFO L109 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-08-22 23:00:26,532 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:26,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:26,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:26,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:26,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:26,575 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:26,576 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:26,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:26,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:26,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:26,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-08-22 23:00:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 23:00:26,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:26,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:26,604 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash -386797637, now seen corresponding path program 1 times [2020-08-22 23:00:26,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:26,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426926550] [2020-08-22 23:00:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:26,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:26,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:00:26,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426926550] [2020-08-22 23:00:26,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:26,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:26,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107549019] [2020-08-22 23:00:26,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:26,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:26,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:26,894 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 3 states. [2020-08-22 23:00:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:27,124 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2020-08-22 23:00:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:27,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-08-22 23:00:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:27,136 INFO L225 Difference]: With dead ends: 167 [2020-08-22 23:00:27,136 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 23:00:27,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 23:00:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-08-22 23:00:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 23:00:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-08-22 23:00:27,195 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 43 [2020-08-22 23:00:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:27,196 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-08-22 23:00:27,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-08-22 23:00:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 23:00:27,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:27,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:27,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:27,199 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 614001090, now seen corresponding path program 1 times [2020-08-22 23:00:27,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:27,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127428794] [2020-08-22 23:00:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:00:27,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127428794] [2020-08-22 23:00:27,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:27,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:27,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893725124] [2020-08-22 23:00:27,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:27,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:27,336 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-08-22 23:00:27,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:27,628 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2020-08-22 23:00:27,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:27,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-08-22 23:00:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:27,631 INFO L225 Difference]: With dead ends: 164 [2020-08-22 23:00:27,632 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 23:00:27,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:00:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 23:00:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2020-08-22 23:00:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-22 23:00:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-08-22 23:00:27,652 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 43 [2020-08-22 23:00:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:27,653 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-08-22 23:00:27,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-08-22 23:00:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 23:00:27,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:27,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:27,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:27,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash -849907375, now seen corresponding path program 1 times [2020-08-22 23:00:27,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:27,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664591208] [2020-08-22 23:00:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:27,740 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:27,842 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:27,886 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:00:27,886 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:27,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:27,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:27 BoogieIcfgContainer [2020-08-22 23:00:27,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:27,980 INFO L168 Benchmark]: Toolchain (without parser) took 2376.34 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 103.5 MB in the beginning and 162.7 MB in the end (delta: -59.1 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:27,982 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:27,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.53 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 181.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:27,984 INFO L168 Benchmark]: Boogie Preprocessor took 40.51 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:27,985 INFO L168 Benchmark]: RCFGBuilder took 472.96 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 155.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:27,986 INFO L168 Benchmark]: TraceAbstraction took 1463.41 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 154.6 MB in the beginning and 162.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:27,991 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 394.53 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 181.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.51 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.96 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 155.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1463.41 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 154.6 MB in the beginning and 162.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] long long sum[1]; VAL [\old(N)=0, N=1, sum={7:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L28] int *b = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, b={-2:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L29] int *c = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L31] sum[0] = 0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L32] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L32] COND TRUE i